Safety-lock for windows and the like



P PAGE.

SAFETY LOCK FOR WINDOWS AND THE LIKE.

APPLICATION FILED mac. 23, 1918.

1,387,302 Y PatentedAug- 9,1921.-

HEEL!!! "llllllllllllll UNITED STATES PATENT OFFICE.

PETER PAGE, OF IPAWTUCKET, RHODE ISLAND;

SAFETY-LOCK FOR WINDOWS AND THE LIKE.

Specification of Letters Patent.

Application filed December 23, 1918. Serial No. 268,053.

or safety latches for locking together two sliding members similar tothe sashes of windows and is intended to provide a device of this classwhich shall automatically lock the two sliding members or sashes againstbeing forced by each other when the sashes or members are in closedposi-' tion. Provision is made by which the unlooking or disengagementis readily effected to allow one sash to slide by the other whileinsuring the automatic locking of the sash when it is restored tolocking position without further attention to the catch By thearrangement hereinafter described,

the window sashes when in closed position must be "automatically lockeddue to the mere shifting of thesash to locking position. Provisionis'made so that in case the catch is moved to release position when thewindow is open it will be impossible to close thewindow 'until'the catchis restored to locking position, hence, no'act of memory is'required tolock the window when it is closed.

In its general feature the invention comprises-a hook member secured,let us say, to the upper sash adjacent to the medial or dividing planebetween the two sashes, and'a latch pivotally mounted in a housing orsupport on the top of the lowersash in alinement with saidhook, saidlatch being provided'with two hook-engaging members one of whichprojects beneath the hook when in looking position and the other ofwhich projects in line with the hook when the latchjis' in released orunlocked position means being provided. for releasing the latchautomatically to locking position when the window is closed by drop vingthe lower sash. and for maintaining the latch r in unlocked. position topermit the opening of the window by the raising of the lowersashor'thedropping of the upper one. v

. It will be understood that. the device is applicable to the locking ofany two sliding adjacent members although it is particularly intendedfor window sash use.

In the accompanying drawings I have illustrated the preferred formembodying the principles of this invention in which Figure 1 is avertical central section showing the sashes automatically locked againstopening.

F ig. 2 is a vertical side elevation showing the housings in sectionwith the latch in released or unlocked position.

Fig. 3 is a plan View showing the latch in looking position. i

Fig. 4 is a horizontal section through the latch housing, a springmember showing.

the means for holding the spring in place. Fig. 5 is a rear elevation ofthe latch member.

In the practice of this invention according to the form illustrated inthe drawings I Patented Aug. 9, 1921.

I provide a hook membera provided with a forwardly projecting lip orlock-engagingomember a adapted to be secured to the lower cross" pieceof. theupper sash m with its; open side projecting inwardly from the.wlndow sash but not beyond the medial or dividing plane between the twosashes extending in the direction of their sliding movement.

On the top cross bar of the lower sash is mounted a housing 6 whose Sidewalls affordsupport for the pivot pin or journal 6 which pivotallysupportsthe latch d.

The latch 03 has a tongue or thumb piece d projecting up through the topof the holusingb as shown in Figs. 1 and 3, and

beyond said thumb piece is provided with an outwardly projecting portionor ledge 03 which engages the lip a when projected outwardly beyond themedial or dividing plane'between the sashes so as to partly side. of thepivotal center is another hookengaging portion (5 so disposed as to lieon the inward side of the dividing plane when the latch is in lookingposition but to spring forward outwardly beyond the dividing plane whenthe upper portion of the latch is thrown inward to sash releasingposition as v shown in Fig. 2. The two hook-engaging members thereforeform parts of an angle lever to alternately project into hook-engagingposition.

Near the central pivot the latch is pro.- 1 110 vided with a ledge orspring engaging porvoverhang the upper sash. On the lower venientlyopened, the heel member (Z acting.

g tension of the spring.

of the window.

tion (2* havingangularly disposed faces the apex of which is engaged bythe bow sprlng 0 to hold the latch in locked position as 1n Fig. 1,while the movement of the latch.

In the position shown in Fig. 1 the projecting hook-engaging portion orlip d of the latch is beneath the lip (4 of the hook member and servesto prevent theopening Pressure with the finger in an inward directionagainst the tongue d swings the latch into completely unlocking positionas in'Fig. 2 withthe heel portion d projecting inward in position toengage the lip a during the initial upward movement of the lower sash ordownward movement of the upper sash. This heel portion d is soproportioned that as it comes into engagement with the lip a it willspring the latch beyond the dead center and restore the latch to lockingposition at the same time allowing the window to be completely opened.The closing of the window wlth the latch in looking position springs theupper side ofthe hook member into engagement against the outer beveledsurface of the latch throwing the latch back far enough to allow thesash to be returned to closed position but not beyond the dead center sothat immediately the lip a has passed by, thelatch The springs back intolocking position. spring employed is a simple bow spring of U-shapedcontour is preferably provided with short side wings'or extensions 0 onits bottom portion to allow the springto,

drop in behind the two lugs 6 formed on the bottom of the housing Z2which serves to keep the spring correctly positioned forservice.

After the window is opened, if anyone should thoughtlessly open thelatch to release position the heel cZ projects beyond the lip a so as toprevent closing of the windew, and in order to close the window thelatch mustbe restored to locking position from which it yields slightlyto allow the window to be closed and then snaps back;

into locking position automatically.

It will, therefore, be seen that the window can not be closed withoutputting the latch intojlocking position while it is veryconautomatically as a re-settingmember for restoring the latch tolocking POSltlOIl.

In other words, when in coma is moved by the other, and a spring engag-What I claim is: 1. The combination of two framesv arranged injuxtaposition to slide by each mounted on the other frame and providedwith two angularly disposed hook engaging portions one of which whenprojected beyond the dividing plane acts to lock both frames againstsliding movement, the other of which when projected beyond the dividingplane acts to restore the latch automatically to locking position wheneither sash ing said latch to hold the same yieldingly on either side ofits dead center of pivotal movement, substantially asdescribed.

2. An automatic sash locking device embracing in its construction alocking hook. rigidly secured to one sash of the window, a latchpivotally mounted on the other sash of the window and formingessentially an angle lever either arm of which may be moved alternatelyinto position projecting beyond the medial plane of the two sashmembers, and a tension spring for yieldingly retaining the latch memberin either position when moved in either direction beyond the deadcenter, substantially as described.

3. In, asash fastener the combination of a latch engaging member fixedto one sash of the window, a latch member pivotally mounted on the othersash of the window in position to engage said fixed member,

said latch having an interlocking projection for engaging saidhookmember, an angularly disposed projecting trip memberara ranged torestore the latch from released to locking position when the window isopened, and a tension springrfor holding the latch in its locking,position or its extreme released position, substantially as described. 1

4. A sashfastener embracing, in combina- 11.0 tion a hook member fixedto one sash, a pivotally mountedlatch arranged on the other sashinjuxtaposition to said fixed member for engagement purposes, saidlatchhaving; a projection on one side of the center arranged to formlockingengagement with said fixed member and having anotherprojectingportion on the other side of the center arranged to lie in the path ofsaid fixed member when the latch is in released position, 1 said latchbeing alsoprovidedv with inclined faces for engagingfsaid fixedmemberwhen the window is being closedin. order to displace thelatchsufficiently to allow the window to be closed and. a spring arranged toreturn the latch to locking position when the sashesare inposition to belocked, substantially as described. j i r 5. Asashfastener embracing inits construction a latch-engaging member secured to one of the membersto be looked, a housing secured to the other member, a latch pivotallymounted in said housing, a tension spring positioned in said housingbeneath the latch to engage a portion of the latch and hold it indefinite position on either side of the dead center of the springpressure, said latch being provided-with two angularly disposedprojecting members adapted to alternately engage-the aforesaid latchengaging member and acting respectively to lock the members againstsliding apart or to restore the latch to locking position when themembers are slid apart, substantially as described.

6. A sash fastener embracing in its construction a hook member fastenedto one sash, a housing fastened to the other sash adjacent to said hookmember said housing being provided with retaining bosses on its bottomsurface, a bow spring provided with wings projecting behind said bossesto retain the spring in position for normal action, a pivoted latchmounted in said housing and having angularly disposed projectingportions to engage said hook member, said latch being also provided witha projecting angle portion engaging said spring on either side of thedirect line of pressure of said spring toward the pivotal center of thelatch, sub

stantially as described.

In witness whereof, I have subscribed the above specification.

PETER PAGE.

